Packing-cup.



- lib-758,410. PATBNTED AER. 26, 1904;.

R. BURNSIDE.

PACKING 0UP. APPLICATION mum D30. 1a, 1903.

no 110mm.

' Attorngys m: m PETERS cu, "mom-nu, WASNING'YON o. c.

through the stuffing-box or vibrationbox Patented April 2 1904.

PATENT O ICE.

ROBERT BURNSIDE, .OFMONTREAL, CANADA.

PACKING-6UP. Y

SPECIFICATION forming part of Letters Fatent No. 758,410, dated April26, 1904.

Application filed December 16, 1903-1 Serial N0- 18534'7- (No model.)

To all whom it may concern: 7

Be it known that I, ROBERT BURNSIDE, a

subject of the King of Great Britain, residing at Montreal, county ofHochelaga, Province of Quebec, Canada,ha've invented certain new anduseful Improvements in Packing-Cups; and I ,do hereby declare that thefollowing is a full,

clear, and exact description of the invention,

such as will-enable others skilled in the artto which it appertains tomake and use the same. My invention relates to smiling-boxes orvibration boxes for steam-cylinders, and e'specially to the constructionof. such parts when used inconnection with locomotive-cylinders.

In applying stufling-boxes to locomotivecylinders, and especially inrenewing the packing-rings, a difficulty arises due to the presence of acollar upon the piston near the crosshead, which collar prevents thepassing of and combination of parts to be more fully describedhereinafter and definitely set forth in the claims.

In the drawings, which fully illustrate my invention, Figure 1 is alongitudinal section constructed according to my invention. In this viewthe piston-rod is shown, together with a portion ofits cross-head end;Fig. 2 is a front elevation of the boX, the piston-rod being shown insection. tive representing a half of the basering which is instrumentalin retaining the packing-rings. Fig. 4 is a perspective representing ahalf of a follower-ring which is also instrumental in retaining thepacking-rings. Fig. 5 is a perspective of a yoke-ring used inconjunction with two half-rings such as shown in Fig. 4.

Throughout the drawings and specification the same numerals of referencedenote like parts.

- Referring more particularly to the parts, 1 represents a portion of acylinder-head, which Fig.3 is a perspecis provided with a bore 2,through which the piston-rod 3 passes, the said bore 2 having anenlarged counterbore 3, forming a recess which receives a powerfulhelical spring 4, as shown, the purpose of which spring will appear morefully hereinafter. Upon the outer face of the head agland '5 isattached, the same having bolt-openings 6 for this purpose. This.ciently large to pass over thecollar 11, which is formed upon the rod3, near the outer eX-Q" tremity thereof. This ring may also have anenlarged counterbore 12, as indicated. The inner face of this main ringconstitutes aseat for a vibration-cup 13, which cup is prefer-L ably ofsubstantially cylindrical form and has a conical bore 14, terminating ina plain cylyndrical bore 15, beyond which there is formed aninwardly-projecting shoulder or' flange 16, at which point the bore issubstantially' of the same diameter as the bore 10 and adapted, like thebore 10, to enable the vibration-cup to be placed over. the aforesaidcollar .11;

The inner face of the shoulder 16 constitutes a seat for a base-ring 17,which ring is preferably formed of two half-rings 18, one

of which is very clearly shown in Fig.3.

These half-rings have cylindrical outer faces 19, adapted'to be receivedby the bore 15, and

have comically-bored faces 20, as shown, which latter faces constituteaseat for a main packing ring 21, which is also formed in halves, likethe ring 17. The inner diameter of the ring 17 is slightl-ylargerthanthe diameter of the piston-rod 3, as shown, while the bore whichflange is of sufliciently large diameter so that its edges will projectbeyond the edges of the counterbore 3 in the cylinder-head. The halvesof this ring 24 are held in position by a yoke-ring 28, the sameconsisting of a plain ring, as shown clearly in Fig. 5. This ring passesover the body 26 and rests upon the under face of the flange 27, asindicated most clearly in Fig. 1.

The parts contained in the gland having been assembled in the mannerdecribed and as illustrated, these parts would then be applied to theouter face of the cylinder-head, as illustrated in Fig. 1, so that thespring 4 could thrust against the follower-ring 24, and in order toinsure perfect steam-tightness of the gland at its inner face the sameisbolted down upon a packing-wire 29, which is preferably formed of softcopper or similar material.

The ease with which the vibration-box described could be applied to thecylinder-head should readily appear, it being understood that the gland5, the main ring 9, and the vibration-cup are all of sufficiently largediameter to pass over the collar 11. The basering 15 being split, itwill be readily put in position after the other parts have been passedbeyond the collar. In like manner the packing-rings could be applied andthe followerring 24, which is held in place by the yokering 28, which isof large diameter, as illus: trated. In this manner the difficultyarising from the presence of the collar is overcome simply and avibration-box is produced which is simple in construction and admirablyadapted for its purpose. The spring t operates to maintain thepacking-rings in position within the vibration-cup, and the fact thatthe follower-ring 24 is of greater diameter than the bore 3 prevents anypossibility of the said follower passing back into the bore 3 when thepiston is moving inwardly, as it might tend to do by reason of thefriction developed. This is an advantageous feature, as it prevents anypossibility of the packing becoming loose or deranged from this cause.

While I have shown in the accompanying drawings the preferred form of myinvention, it will be understood that I do not limit myself to theprecise form shown, for many of the details may be changed in form orposition without affecting the operativeness or utility of my invention,and I therefore reserve the right to make all such modifications as areincluded within'the scope of the following claims or of mechanicalequivalents to the structures set forth.

Having described my invention, what I claim, and desire to secure byLetters Patent, is

1. In combination, a gland adapted to be attached to a cylinder-head andadapted to have a piston-rod pass therethrough, a vibrationcup, meansfor supporting the same within said gland, said vibration-cup having anenlarged diameter with a forwardly-projecting shoulder, a base-ringformed in sections and of a restricted inner diameter seating upon saidshoulder, packing-rings seating upon said base-ring within said cup, anda follower-ring adapted to retain said packing-rings.

2. In combination, a gland adapted to be attached to the outer side of acylinder-head and adapted to have a piston rod pass therethrough, avibration-cup supported therein and having an enlarged inner diameterwith an inwardly-projecting shoulder, a base-ring formed in sections andhaving a restricted diameter seating upon said shoulder, packingringsseating upon said base-ring, a followerring made in sections and adaptedto retain said packing-rings, and a yoke-ring of enlarged diameterencircling the sections of said follower-ring.

3. In combination, a gland, a piston-rod passing therethrough and havinga collar of enlarged diameter, a vibration-cup carried within said glandand .having an enlarged inner diameter adapted to pass over said collarand having an inwardly-projecting shoulder, a base-ring formed insections seating upon said shoulder and having a restricted innerdiameter, packingrings seating upon said base-ring. a follower-ring madein sections and having a restricted diameter, and a laterallyprojectingflange, a yoke-ring encircling the body of said follower-ring, acylinder-head having a counterbored recess therein, and a springreceived within said recess and thrusting against said follower-ring.

In witness whereof- I have hereunto set my hand in the presence of twowitnesses.

ROBERT BURNSIDE.

Witnesses:

T. MYNARD, M. MCALEER.

